- widget:add_item_of_type() now uses lua 1-based indicies and throws lua errors on wrong indicies. (previously used c++ 0-based indexing, and could lead to assertions when wrong indicies were used, )
- widget:add_item() now has a optional location pos parameter as claimed in the wiki
- the pos and count paraemters in widget:remove_items_at() are now optional and default to removing the last element
With this is matches the behavior of the standart lua functions table.insert and table.remove which is imo what lua writers expect.
